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Finding the Fourth Proportional to 480.75, 721.53 and 192.20

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Solution

The fourth proportional to 480.75, 721.53 and 192.20 is: 288.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.75 : 721.53 = 192.20 : x
  2. Step 2: Convert to fraction form
    480.75/721.53 = 192.20/x
  3. Step 3: Cross multiply
    480.75x = 721.53 × 192.20
  4. Step 4: Simplify right side
    480.75x = 138,674.46
  5. Step 5: Solve for x
    x = 138,674.46/480.75
  6. Step 6: Final answer
    x = 288.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.